Transcription of DEVELOPING THE ‘BIG’ IDEAS IN NUMBER
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DEVELOPING THE ‘BIG’ IDEAS IN NUMBER
Department of Education Di Siemon: 23/01/07 Page 1 Last updated: State of Victoria 2007 DEVELOPING THE BIG IDEAS IN NUMBER One of the main aims of school mathematics is to create mental objects in the mind s eye of children which can be manipulated flexibly with understanding and confidence. A prolonged reliance on inefficient strategies such as make-all-count-all or counting-by-ones is both developmentally dangerous and professionally Prepared by Professor Dianne Siemon, RMIT University .. NUMBER SENSE refers to a person s general understanding of NUMBER and operations along with the ability and inclination to use this understanding in flexible ways to make mathematical judgements and to develop useful and efficient strategies for managing numerical situations. It results in a view of numbers as meaningful entities and the expectation mathematical manipulations and outcomes should make sense.
counting tens, eg, “1 ten, 2 tens, 3 tens, 4 tens …” • Introduce the names for multiples of ten - language only, no symbols • Make, Name and Record numbers 20-99 using appropriate models - eg, “make 6 tens 3 ones”, read and write “sixty-three”, record using a place-value chart
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